Einhell GH BC 43 Brush cutter strimmer vibration

DUTR

I have just purchased one of these strimmers, set it up today and when using it the vibration is very very strong above half throttle, is this normal? 
I have scoured some threads of various machines, they refer to the shaft being bent after some use, as this was the 1st use, I was ruling that out.
I was using the scythe attachment if that makes any difference?

Jackmydad

When you say "scythe" you mean the brushcutter blade?
They tend to have more vibration than the line trimmer head in my experience, but it shouldn't be that excessive.
If it's OK with the line trimmer head then I'd wonder about the balance of the blade, and have a good look at it.

Alfrescodave

When I use my brushcutter blade there is more vibration than with the strimmer line but nothing excessive. Has there been any damage to the blade which might cause this vibration? Is there any vibration when using the strimmer line? Also try it with neither attachment this might indicate if the shaft is bent.

DUTR

Yes I since went back to the garage and started it up without the lance and brushcutter blade and there was minimal vibration (nothing significant compared to say an electric mower.

DUTR

Alfrescodave said:

When I use my brushcutter blade there is more vibration than with the strimmer line but nothing excessive. Has there been any damage to the blade which might cause this vibration? Is there any vibration when using the strimmer line? Also try it with neither attachment this might indicate if the shaft is bent.

I have not tried the strimmer line yet, the unit is brand new it was the 1st use today, I was surprised at how much vibration there was , I will check that I have put the brush cutter blade on correctly.

Jackmydad

Yes, make sure you have any bushes and washers the right way round.
Should be some way to hold the blade central on the bolt. On mine it's a stepped flange that provides the drive, and a cupped washer that goes over it. (I had to think for a minute there!)
There shouldn't be vibration like you're describing.

DUTR

Jackmydad said:

Yes, make sure you have any bushes and washers the right way round.
Should be some way to hold the blade central on the bolt. On mine it's a stepped flange that provides the drive, and a cupped washer that goes over it. (I had to think for a minute there!)
There shouldn't be vibration like you're describing.

Lol, slapped wrist for me, you'd replied before I could update... well I had a look at the blade and from the arrows the distance to the centre was not symmetrical, so I moved it and bingo! Then when I returned from the shops I decided to have another look as the blade free wheeled and you are right the dome washer was the wrong way round (even though I followed the diagram) it's a tight fit now and works a treat, only trouble is my hands as still frazzling from this morning

Jackmydad

Don't know if you've done this, but I generally try to get the manual in PDF form.
At least that way you can generally blow it up big enough to see properly.
This your's?
https://assets.einhell.com/manuals-pdf/900_287819/gh-bc-43-as.pdf

wellybike

Hi, I have the same problem, only used it once. Could you send me a picture of how you fitted the scythe blade and the dome washer. I also followed the instructions so maybe mine is upsidedown. wellybike@yahoo.co.uk. thanks in advance